Ghost Pokemon.
The fifth Gym Leader in Pokemon LeafGreen is Koga, the leader of Fuschia City's Gym. He specializes in Poison-type Pokemon and hands out the Soul Badge.
To get the Olivine City Gym leader to battle you, you have to go to the top of the lighthouse and help her heal a Pokemon by getting medicine from a man across the sea in Cianwood. The leader there, Chuck, is actually the fifth, and Jasmine is the sixth.
The fourth gym leader in Pokemon Soul Silver is in Ecruteak City.
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the 15th gym leader in soul sliver is blaine and he uses only fire type pokemon
in viridian city
in his gym
Face the elite four.
Cinawood City.
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the 16th gym leader is:Trainer Blue